Debbie has two stocks, X and Y. Consider the following events: X = the event that the price of stock X has increased
Y = the event that the price of stock Y has increased
The event "the price of stock X has increased and the price of stock Y has not increased" may be written as
A)X′∩Y
B)X or Y′
C)X∩Y′
D)X or Y

Question

Quizplus · Accepted Answer

The event "the price of stock X has increased and the price of stock Y has not increased" means that X has occurred but Y has not occurred. This can be represented as the intersection of X and the complement of Y (denoted by Y′). Therefore, the correct choice is C, which is X∩Y′.

Debbie Has Two Stocks, X and Y